Determine which similarity postulate ( aa , sas , sss) theorem we can use to determine the value of x ,the width of the river . find the width of the river.

In the first triangle 80+20+p=180 (since sum of all angles of a triangle is 180)so p= 80also in second triangle 55+45+q=180 (since sum of all angles of a triangle is 180)so q=80so we can conclude that p=80 degrees q=80 degrees so p=q=80 degreeshence option b is correct

i believe it's a.

i'm not sure on this one, most likely correct.

good luck!